Dust cart



5 Sheets-SheetA l o. BALLERT Aug. 12, 1941.

` DUST CART Filed July 18, '1939 Allg. 12, 1941 o. BALLERT l 2,252,608

Y DUST CART Filed July 18. 1959 3 Sheets-Sheet 2 Otto BaZZe/ -/v Ve nfor:

Aug. l2; v'1941. Y o. BALLERT 2,252,608

DUST CART Filed July 18, 1959 :s sheets-sheet 5 Patented Aug. 12, 1941VUNITED f. STAT DUST CART Otto Ballert, Berlin, Germany Application July1s, 1939, serial No. 285,20 In Germany July 14=, 1938 l 11 Claims.

This invention relates to a dust cart, in which the refuse is dumped atthe rear ofthe cart `through a hopper or opening `into a dumping chambervand is pressed into the interior of the cart by means of a rudder-likewall member, which is adapted to be rocked about an axis, or anoscillatory rudder-like plunger, in such a way that by reason of therefuse added upon each scillation of the plunger, theentire space :ofthe cartis gradually iilled out, and at `thesame time, during thefilling action, and particularlyv inthe final stages thereof, the refuseis caused to be compressed. f o

Dust carts `of this character havealready been proposed heretofore. Inthe known arrangements the oscillatory rudder-like plunger or theoscillatory wall member is disposed in an upright position on a levelwith the horizontal bottom of the cart. The oscillatory plungeris rmlyconnected to a Vertical shaft or column, which is mounted at its twoends on the top and thebottomv of the cart and is mechanically' driven.

This known arrangement is accompanied by Vcertain disadvantages asfollows: Owing to the disposal of the oscillatory plunger verticallywith respect to the horizontal bottomof the collecting chamber, which4.plunger for normal conditionsmust have a certain minimumheight andabove which a sufficiently high iilling space must Abe available belowthe dust bin from which the refuseis dumped, the hopper or opening forthe introduction of the refuserequires to be situated some considerableheight above the ground. This, ofcourse, is a disadvantage in thedumping of the refuse, as the dust bins then require to be liftedaccordingly. l

- `The 4dumping space below the dust bin being emptied should not be toosmall, as the air displaced upon the dumpingV of the refuse should be`allowed to escape readily without whirling up the` dust, 'and this canonly be accomplished by providing the dumping chamber with a certainminimum volume. Further, in the known arrangement of the oscillatoryplunger the pressing of therefuse into the inner collecting chamberisalso accomplished by diihculties, asin View of the horizontal movementof the refuse along the bottom of this chamber a filling of the lat-.ter is only possible after ,the accumulating refuse -has .beencompressed to such extent vthat it is liftedrup the end wall of thecollecting chamber :byfreason of its inherent pressure. With thisarrangement a complete iilling of the collecting chamber at .the rearend of the cart in the vicinity of'theloscillatory plunger ispractically impossible despite the use of arconsiderable amount offorce. Considerable diiculties are also encountered in the discharge ofthe refuse; as the rotary column, which is mounted onthe body of thecart itself and to which there is secured the oscillatory plunger,greatly obstructs the removal of the refuse upon the discharge of thecart by tilting towards the rear. Y. 1 j

These disadvantages are undoubtedly responsible for the fact that thistype of construction, despite its other advantageshas never been-putinto practice, and that this solution of the problem has again beendropped entirely.`

The disadvantages aforesaid are eliminated by the invention. The latterresides principally in the fact that the preferably hydraulically drivenrotary. column together with the oscillatory wall or plunger`iirmlyjconnected theretoris arranged or mounted on the upwardly`sliding Vor liftable closure member at the rearof the body of the cart,and that the column is ,not` disposed vertically with respect to the`horizontal bottom 0f the collecting chamber, but slopes towardsV therear corresponding to thesloped bottom of v,the dumping space withintheupwardly sliding or liftable closure member, on which bottom the columnis vertically mounted. Injthisway `it is accomplished thatwithoutdecreasing the height of the dumping chambertheV hopper oropening through which the refuse isdumped can be located at aconsiderably lower levelas'f compared with the known arrangements,Sov-that difficulty in lifting the dust bins is greatly reduced. Theslopingbottom -withinthe dumping chamber is responsible for the factthatthe rear end of the collecting chamber bottom, which connects up withthe bottom o f they dumping chamber without aV break substantiallyintheqentirev breadth ofthe latter, is also -sloped and ascends up to acertain pointv above the rearaxle of the cart; fromwhich point itagainwdescends tothe level of the horizontal bottom ofthe collecting4chamber proper. In consequence the refuse isdistributed much morereadily within thefcollecting chamber, and the latter is filled outcompletely up to its rear, end under less pressure than that required`in the case of the known construction. Three; embodiments of theinventionare ,illustrated by .way of 'exampleinythe accompanyingdrawings, the one embodiment being designed for the use of standarddustlbins, which are simultaneously actuated by .the driving means forthe oscillatory plunger, i. e., Aare emptied. into `the `cart and againreturned, whilst f a. secondrembodiment allows for'the use of other thanstandard.` bins.

the column (Figs. l andr2, 6', 7 and 10).

Figs. 6 shows the dust card according to Fig. 1Y Y.

in the tipped position.

Figs. 'l to 10 illustrate a possible embodiment of the invention havinga sliding closure member at the rear.

provide a special locking means for the closure member, as otherwise thelatter would be caused to lift. This locking means is not illustrated inFigs 1 to 6. In the embodiment of the invention equipped with a slidingclosure member a special locking device can be dispensed with, as theforces occuring upon the lling in of the refuse and tending to move theclosure member are taken up by the guide means for the closure member.In Fig. 8a there are shown guide rolls. For raising the closure memberthere is provided a special hydraulic lifting device, which isaccommodated Vlin a narrow shaft at the top of the collecting chamber(Figs. 'l to 10).

Fig. 7 is an elevational view of-the .dust vicarlt, V partially insection, in the normal upright -posi- -v tion for the collection ofrefuse.

Fig. 8 is a partial plan view of Fig. '7.

Fig.8a showson-enlargedfscale a section taken through a guide forVthesliding closure member on the :line 8-8 in Fig. 7.

Fig. 9 is ka rear Aview of the dustcar-t according to Fig. "7.

Fig. 10 .is anelevational view, partially in section, of the dust cartaccording to Fig. V'7 in :the position in which the refuse is again`discharged.

In the drawings, I is the collectingchamber, 2 the liftable or slidingvclosure Amember at the rear, and f3l the dumping chamber, in which thereis mounted the hydraulically rdriven column ,4 for the oscillatory wallmember 5, 4which is firmly connected to the said column. The hydraulicdriving means for-the `wall or plunger 45 -is'pro videdeither at thelower or at the upper end of 4As shown-'by Figs. 4 and 8, there Iisprovided fonthe hydraulic :motor- `a xedpiston 6,4 over which there isarranged :to reciprocate a cylinder 'I, which 4at the piston-rod ,Saoftheepiston lis .sealed inthe usualfashion. --The one Iouter-portion ofthe cylinder is #designed as `or lfurnished with aftoothed rack V'8.flhertecth of -this 'rack y.mesh with la toothed segment 9,lwhich inlthecaserof a liftable -closure member is mounted -rmly on the drivingcolumn 4 for ithe oscillatory-plunger 5, whilst in the case -of- -asliding closure member it is carried by a separate bearing 9a on thebody of-the cart Vv('FigflO).v -Y

Fig. -11 isa plan --viewV of the hyraulic drive on enlarged scale.- l YThe lhydraulic pump vwith the requisite rcontrol and reversingelementsis designated-II). 'From the same pipes -I-I lead to the hyd-raulicdriving means for the oscillatory plunger. V-The details are notshow-nin the drawings.` l

The pipes for the tipping devicev lI3 of the car are designated` I2.rIhe control system, which does not form -part -ofthe present invention,is so designed that there can be actuated as desired v eitherthetippingdevice with the discharge Ytrap openorlthe refuse collectingdevice with .the trap closed. If standard dust bins are provided therocking arm for the bins is connected as repre# sented in Figures 1 and`6 in theV conventional manner to the` oscillatory plunger, in such away thatLuponeachoscillation of the plunger the bin is moved in positivefashion, ,i.` e., is tippedinto the` icart and againk swung. out, soVthat upon each oscillatory movement of Vthe plunger refuseV is.conveyed into the ,collectingchamben l lIn the embodiments oftheinvention equipped with .'a liftable .closure Lmember lit. is Anecessaryin loading refuse Jint'o 'the .collecting chamber to 75 I 4 is a cableor chain, theone end of which is secured at I5 to the lower portion ofthe sliding closure member and passes Aover a guide roll I6 and a looseroll I'I to the hydraulic cylinder I8, where the other end of the cableis secured at I9. The loose roll I'I is mounted in the piston rod 20,which is bifur- 4cated at this `point and is again guided at l2l).

'The sliding closure member '2 is guided along the two sidesrof thecollecting `chamber I by Vmeans `of rolls 2I. These rolls 2| run inarcuate .U-section .iron members L22, which are secured to ythecontainer I.

`place .until theclosure member has beenfully raised. Similar dimensionsalso apply to the collectinffchamber with `liftablefclosure member inaccordance with Figs. 1 to 6,*in which,fhowever the parts involved haveAnot been speciiically shown.

What I claim as new and desire to secure by Letters Patent is: v

1. A dust cart of the character described, -comprising aV tiltablymounted body member formed 'asa ,collectingchambena closure membermovably associated to the Irear of said body member `and' .having adumping chamber arranged therein, saiddumping chamber having a flatrearwardly `slopingbottom adapted to match a correspondingly. slopedadjacent Abottom part of said collecting chamber substantially in the.entirezbreadth of the latter and alsolcomprising an oscillatoryrudder-like member 4mounted Yin said. closure member rso as bodily tomove `there- Iwithand having ,its `axis `ol oscillation sloped towardsthe rear .of said .closure member, so Athat said axis .is perpendicularwith rrespect Ato the flat rearwardly sloping ,bottom .part of saiddumping chamber and to the adjacent sloping rear endof the ycollectingchamber rbottom, said lrudderflike `member .being adapted to perform areciprocatory ,angular motion in saidldumping vchamber-:to .conveyrefuse in a general upward and forward direction from .said dumpingchamber into said collecting chamber.

v2. A device according ,to claim 1, ,in which a `column is `provided`for supporting and actuating said Voscillatory rudder-like member, saidcolumn being mounted in said movable closure memberiso as bodily to movetherewith and 'havingits axis of oscillation sloped towards the rear ofsaid closure member, and in Whichdriving means and a gear are providedadapted to impart a reciprocatory oscillation rto said column, said gearbeing located at the one end of said column for transmitting the powerfrom said driving means to said column.

3. A device Iaccording to claim 1, in which a column is provided forsupporting and actuating said oscillatory rudder like member, saidcolumn being mounted in said movable closure member so as bodily to movetherewith and having its axis of oscillation sloped towards the rear ofsaid closure member, and in which a toothed segment is associated Withthe said column 'and a hydraulic motor is arranged having a toothed rackadapted to engage with the said segment, so as to impart a reciprocatoryoscillation to said column and to said rudder-like member supported onand actuated by said column.

4. A device of the character described, comprising a body member formed'as a collecting chamber, a closure member movably associated to therear of said body member 4and having a dumping chamber arranged therein,an oscillatory rudder-like member adapted upon its oscillation to conveyrefuse from the said dumping chamber into said collecting chamber, saidclosure member being adapted to slide upwards at the rear of the saidcollecting chamber, a hydraulic lifting device for the said closuremember disposed in the upper part of the said collecting chamber, adriven column supporting and actuating the said oscillatory member,driving means for the said column, and a hydraulic tipping device foremptying the said collecting chamber, the said lifting device and thesaid tipping device being connected to a common pressure source and thesaid lifting device being so dimensioned that it completes the liftingof the said closure member before the said tipping device enters intooperation.

5. A device of the character described, comprising a body member formedas a collecting chamber, a closure member movably associated to the rearof said body member and having a dumping chamber arranged therein, anoscillatory rudder-like member adapted upon its oscillation to conveyrefuse from the dumping chamber into the collecting chamber, a drivencolumn supporting and actuating the said oscillatory member, the saidcolumn being mounted in the said closure member, a toothed segment inassociation with the said column, and driving means for the said columncomprising a fixed piston and a piston rod extending from the piston inboth directions, a cylinder moved hydraulically with respect to the saidpiston and piston rod, and 4a toothed rack on the outer side of the saidcylinder adapted to engage With the said segment.

6. A device according to claim 5, in which the said movable closuremember is adapted to be lifted upwards together with the saidoscillatory member and the said column from the l rear of the saidcollecting chamber, and in which 'a gear is provided for transmittingpower from the said driving means to the said column member and the saidcolumn from the rear of the said collecting chamber, and in which a gearis provided for transmitting power from the said driving means to thesaid column which is located at the lower end of the said column, and inwhich a bin and means are provided in association with the drivingcolumn for tipping and returning the bin conjointly with the oscillatorymovement of the said oscillatory member. l

8. A device according to claim 5, in which the said movable closuremember is 'adapted to slide upwards together with the said oscillatorymember and the said column at the rear of the said collecting chamber.

9. A device of the character described, comprising a body member formedas a collecting chamber, a closure member movably associated to the rearof said body member and having a. dumping chamber arranged therein, anoscillatory rudder-like member adapted upon its oscillation to conveyrefuse from the said dumping chamber into the said collecting chamber,said closure member being `adapted to slide with its side edges over therear edges of the collecting chamber, rolls interposed between the saidedges to assist the sliding action, a driven column supporting 'and'actuating the said oscillatory member, the said column being mounted inthe said closure member, and driving means for the said column locatedat the one end of the said column.

10. A device according to claim' 9, in which a hydraulic lifting deviceis provided disposed in the upper part of the said collecting chamber,and means are provided connecting the hydraulic device to the lowerportion of the said closure member for the purpose of lifting the saidclosure member.

11. A device of the character described, comprising a body membercomposed of collecting and dumping chambers and an oscillatory member,said collecting chamber being associated with the dtunping chamber andthe oscillatory member being adapted upon its oscillation to conveyrefuse from the said dumping chamber to the said collecting chamber, aclosure member adapted to slide upwards at the rear of the saidcollecting chamber, a hydraulic lifting device for the said closuremember disposed in the upper part of the said collecting chamber, adriven column supporting and actuating the said oscillatory member,driving means for the said column, and a hydrauic tipping device foremptying the said collecting chamber, the said lifting device and thesaid tipping device being connected to a common pressure source and thesaid lifting device being so dimensioned that it completes the'liftingof the said closure member before the said tipping device enters intooperation.

OTTO BALLERT.

